Phenyl isocyanate → 2-Amino4-{4-[3-phenyl-ureido]-phenyl}-thiophene-3-carboxylic acid amide

Participants

Reaction Steps

Crude 2-amino-4-(4-amino-phenyl)-thiophene-3-carboxylic acid amide (0.15 mmoles, 1 eq) is dissolved in 5 mL THF and treated with 400 μL of 0.35 M THF solution of phenyl isocyanate (0.15 mmoles, 1 eq). When the reaction is complete, as judged by TLC analysis, the reaction mixture is diluted with 1 mL methanol and 1 mL triethylamine, stirred for 30 minutes, and concentrated to dryness. The residue is purified by prep HPLC yielding pure 2-amino-4-{4-[3-phenyl-ureido]-phenyl}-thiophene-3-carboxylic acid amide.

Provenance & Evidence